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IEEE Sensors Journal > 2011 > 11 > 4 > 882 - 887
IEEE Transactions on Nanotechnology > 2011 > 10 > 3 > 652 - 656
IEEE Sensors Journal > 2009 > 9 > 1 > 9 - 12
IEEE Sensors Journal > 2008 > 8 > 8 > 1397 - 1398